Recently I have learned that Blood type can offer clues about a person's genetic heritage. For example, the most common blood type is O+. However AB blood or O- and are rare blood types. In fact there are conspiracy theories about the origins of the RH Negative blood type as it is cannot be traced back to the gene of rhesus monkey. RH positive people have this gene, which RH negative people do not. There is also a popular nutrition diet based on eating what you should be from a genetic stand point called, Eat Right 4 Your Blood Type. Assuming that a big cock is a genetic trait, I am curious to know if there is a trend that could be found between blood type and cock size. Please provide your size and your blood type. I am A- and have 8".